Her first tweet, at 3am as she started to go into labour read: "Here we go lovelies! Contractions started at 2.30am! Baby decided he wants to come to his sister's 1st birthday party on Saturday!"

Fi's last tweet at 12.25pm before giving birth read: "Last tweet before birth: still going strong my lovelies. Still no pain relief!"

And less than 20 minutes after the birth she took to Twitter to announce: "Introducing Oscar John Michael Victor Stone. Thanks so much for all your support. I'm shattered and sore but the happiest mummy on the planet."